We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

Author Topic: CW on 6100 kHz 49m 0157 - 0205 UTC June 27 2010  (Read 2993 times)

Offline 4405486

  • Jr. Member
  • **
  • Posts: 97
    • View Profile
CW on 6100 kHz 49m 0157 - 0205 UTC June 27 2010
« on: June 27, 2010, 2340 UTC »
Can anybody Identify this? +/- 35 wpm Morse Code too fast for me to copy under poor conditions.
Is this some Amateur Frequency in another ITU Region? or Coastal Maritime "Marker"?
Could only copy bits and pieces CQ ? BT K could not make out a call sign.
Co-channel with at least two other distorted Spanish Language Broadcasters. Through strong atmospheric and "buzzing" continuum
noise and turbulence. I've noticed this before on Saturdays (local) and wondered why CW was on this frequency?
Possibly Tone Modulated- it's not the Cubans, they can't send that fast- neither can I.

Geo-Mag Storm due to Coronal Hole  WWV @ 0218 UTC reported SFI: 75  A: 14  K: 3
When the event is caused by Coronal Hole, seems to be some lack of correlation between Indices and the severity of the storm; or
so it seems to me.

At any rate I'll go google ITU Regions. Cheers

Offline 4405486

  • Jr. Member
  • **
  • Posts: 97
    • View Profile
Re: CW on 6100 kHz 49m 0157 - 0205 UTC June 27 2010
« Reply #1 on: October 05, 2010, 2246 UTC »
OOPS! Mystery Solved. These are image signals from the 40m Amateur Bands. Past Saturday propagation was fairly good and was observing a number of CW signals in this Broadcast Segmant. Assuming a Receiver IF Frequency of 455 KHz; double that value giving you 910 KHz. Your Receiver (if it's cheap like mine) might pick up image signals 910 KHZ above or below a strong signal on a Fundamental Frequency. For example I noticed CW pile-ups on 6140 KHz (Broadcast Segment of the Band); Thus: 6140 + 910 = 7050 KHz. When I tuned to 7050 KHz (CW portion of the 40m Amateur Band) I heard these same CW pile-ups in thier proper location and much stronger. In my case there were no Image signals 910 KHz above; say, 7050 KHz at 7960 KHz. Cheap Radio with Poor IF Filtration. Cheers

 

HFUnderground T-Shirt
HFUnderground T-Shirt
by MitchellTimeDesigns